Shasan Piping Solution is a renowned manufacturer, exporter and trader of WP1 Alloy Steel Pipe Fittings. WP1 alloy steel pipe fittings seem to fall into both categories, as they have the properties of both stainless steel and nickel. The advantage of WP1 alloy steel pipe elbows is that they can be precipitation hardened and strengthened by heat treatment. https://www.shasanpiping.com/alloy-steel-wp5-buttweld-fittings-manufacturers-exporters-suppliers-stockists.html